stu``` scala object W50 { class Student() {} class Teacher()

scala


object W50 {
  class Student() {}
  class Teacher() {}

  def main(args: Array[String]): Unit = {
    val age: Int = 1

    val stu = new Student()

    println(stu.getClass)
    println(age.getClass)


    println(stu.isInstanceOf[Student])
    println(stu.isInstanceOf[Teacher]) 
  }
}

屏幕截图 2025-10-29 102651.png

scala

object W49 {
  class Student(var name: String, var age: Int) {
    override def toString: String = s"姓名：${name}"
  }

  def main(args: Array[String]): Unit = {
    val stu1 = new Student("振东", 18)
    val stu2 = new Student("继科", 18)

    println(stu1)
    println(stu2)
  }
}